U140E Overhaul Kit, new and ready to install. Fits the U140E. Ships fast from the USA.
A Toyota Camry V6, Highlander, RAV4, Matrix or Lexus RX300 with an Aisin U140E or U140F that flares on the 2-3 shift, takes its time finding Reverse, or slips once the fluid is hot usually needs more than a fluid change. This U140E/U140F overhaul kit is a full soft-parts set for the teardown: friction plates and steel plates for the clutch packs plus the pan gasket, valve body separator gaskets, front and rear seals, lip seals, O-rings and sealing rings, as shown in the product photo. It covers front-wheel-drive U140E and all-wheel-drive U140F units from 1999 through 2013.
The U140E is a four-speed transaxle built by Aisin for transverse V6 and four-cylinder Toyota and Lexus models; the U140F is the same gearbox with a transfer output for AWD. Each gear is selected by applying a clutch or brake pack with oil pressure routed through the case, the rear cover and the rotating drums. Two things wear out: the friction lining on the plates, and the rubber and Teflon seals that hold the pressure that clamps those plates. When the seals leak, the pack slips and burns its lining; once the lining is burnt, new seals alone will not stop the slip. Replacing both together is the reason to buy a combined kit instead of a gasket set.
The weak spot Sonnax and Transmission Digest both point to is the direct clutch circuit. Its sealing rings wear into the ring grooves of the cover, and the direct drum gets grooved where those rings ride. Correct sealing ring to ring land clearance is .003 to .005 inch, and a grooved drum should be replaced, not sanded. A missing or misplaced rubber washer seal between the case and the rear cover causes the same pressure loss.
Rule out the electrical side first. Sonnax suggests unplugging the transmission connector: if you still have no Reverse with it disconnected, look at the B2 control valve and the valve body rather than the clutches. Check the fluid level hot and pull the pan to see what is on the magnet. Our Aisin slipping under load guide walks through the order of checks, and the U140E and U140F problems and cost page covers what a rebuild typically involves.
The kit is listed for these applications:
Read the transmission code on the case or the build tag and match it to this list. Toyota revised the U140 several times, and early and late units use different valve bodies (Sonnax splits them at 1999-2005 and 2006-2012, with and without a central lube feed), so plate counts and gasket shapes can differ. If you are not sure, send us the year and VIN before ordering. You can browse other parts for this family on the Aisin transmission parts page.
| Fits | U140E |
| Part type | Overhaul Kit |
| Condition | New |
| Brand | OEM |
| Reference | U140F |
| Ships | From the USA |
| Warranty | 1-year |
Yes. As pictured, it includes friction plates and steel plates along with the gaskets, seals, O-rings and sealing rings. It does not include bonded pistons or a filter.
The kit is listed for both the U140E (FWD) and the U140F (AWD), including 2001-2012 RAV4 and 2001-2007 Highlander applications. Match the code on your transmission or send us your year and VIN.
A filter and pan gasket, any drum with grooved sealing ring lands, and bonded pistons if their seals are hard. Many builders also replace the shift solenoids while the unit is apart.
The most common cause is pressure loss in the direct clutch circuit: worn sealing rings, a grooved direct drum or a missing case-to-rear-cover washer seal. New seals and frictions fix it only if the drum is still in spec.
Use the Toyota ATF your owner manual lists, Type T-IV on the earlier units and WS on some later ones, and check the level hot per the factory procedure.
